From a55a34f9f0d6218940b2bf1b3b970d2836380ee1 Mon Sep 17 00:00:00 2001
From: Jan Grewe <jan.grewe@g-node.org>
Date: Sun, 27 Dec 2020 12:52:14 +0100
Subject: [PATCH] [main] store recent files in settings, add constants.py for
 global constants

---
 constants.py    |  7 +++++++
 file_handler.py |  1 -
 main_window.py  | 56 ++++++++++++++++++++++++++++++++++++++++++++-----
 3 files changed, 58 insertions(+), 6 deletions(-)
 create mode 100644 constants.py

diff --git a/constants.py b/constants.py
new file mode 100644
index 0000000..4ec9052
--- /dev/null
+++ b/constants.py
@@ -0,0 +1,7 @@
+organization = "nixio"
+application = "nixview"
+version = 0.1
+
+settings_recent_files_key = "/".join([organization, application, "recent_files"])
+settings_recent_file_max_count_key =  "/".join([organization, application, "recent_files_max_count"])
+settings_recent_file_max_count = 10
\ No newline at end of file
diff --git a/file_handler.py b/file_handler.py
index 64b0c23..b251ed2 100644
--- a/file_handler.py
+++ b/file_handler.py
@@ -12,7 +12,6 @@ class Singleton(type):
 class FileHandler(metaclass=Singleton):
     
     def __init__(self) -> None:
-        print("Handler Init")
         super().__init__()
         self._nix_file = None
         self._file_requests = []
diff --git a/main_window.py b/main_window.py
index e7feeee..ebe6f58 100644
--- a/main_window.py
+++ b/main_window.py
@@ -1,15 +1,19 @@
 import sys
+import os
 from typing import Hashable
 from PyQt5.QtWidgets import QFileDialog, QFrame, QLabel, QListWidget, QMainWindow, QMenuBar, QStackedLayout, QToolBar, QAction, QStatusBar, QVBoxLayout, QWidget, QGridLayout, QSpacerItem, QSizePolicy
 from PyQt5.QtGui import QIcon, QPixmap, QKeySequence
 from PyQt5.QtCore import Qt, QSize, QSettings
+from numpy import unique
 
 from file_handler import FileHandler
+import constants as cnst
 
 class NixView(QMainWindow):
     
     def __init__(self, *args, **kwargs):
         super(NixView, self).__init__(*args, **kwargs)
+        
         self.setWindowTitle("NixView")
         self.setWindowIcon(QIcon('./icons/nixview.icns'))
 
@@ -58,16 +62,31 @@ class NixView(QMainWindow):
         file_menu.addAction(self._quit_action)
         self.setMenuBar(menu)
     
+    def _update_recent_files(self, filename):
+        settings = QSettings(cnst.organization, cnst.application)
+        recent_file_max_count = settings.value(cnst.settings_recent_file_max_count_key, 10, type=int)
+        filenames = settings.value(cnst.settings_recent_files_key, [])
+        new_filenames = [filename]
+        if len(filenames) < recent_file_max_count:
+            new_filenames.extend(filenames)
+        else:
+            new_filenames.extend(filenames[:-1])
+        new_filenames = list(unique(new_filenames))
+        settings.setValue(cnst.settings_recent_files_key, new_filenames)
+        del settings
+        
     def on_file_open(self, s):
         dlg = QFileDialog(self, 'Open nix data file', '', "NIX files (*.h5 *.nix)")
         dlg.setFileMode(QFileDialog.ExistingFile)
         filenames = None
         if dlg.exec_():
             filenames = dlg.selectedFiles()
-            success, msg = self._file_handler.open("nix_test.h5")
+            success, msg = self._file_handler.open(filenames[0])
             self.statusBar().showMessage(msg, 5000)
-            self._file_close_action.setEnabled(success)
-            self._cw.show_file_content()
+            if success:
+                self._file_close_action.setEnabled(success)
+                self._cw.show_file_content()
+                self._update_recent_files(filenames[0])
 
     def on_file_close(self, s):
         self._file_handler.close()
@@ -136,7 +155,34 @@ class SplashScreen(QWidget):
         frame = QFrame()
         l  = QVBoxLayout()
         l.addWidget(QLabel("Recently opened files:"))
-        l.addWidget(QListWidget())
+        
+        self._file_list = QListWidget(self)
+        self._file_list.itemClicked.connect(self._on_file_clicked)
+        self._file_list.itemDoubleClicked.connect(self._on_file_clicked)
+        l.addWidget(self._file_list)
         frame.setLayout(l)
         layout.addWidget(frame, 3, 1)
-        
\ No newline at end of file
+        self._file_map = {}
+        self._read_recent_files()
+        
+    def _create_short_filename(original, max_len=40):
+        short = original
+        parts = original.split(os.sep)
+        print(parts)
+        return short
+        
+    def _read_recent_files(self):
+        settings = QSettings(cnst.organization, cnst.application)
+        filenames = settings.value(cnst.settings_recent_files_key, [])
+        del settings
+        
+        for f in filenames:
+            shortname = _create_short_filename(f, max_len=40)
+            self._file_map[f] =shortname
+            self._file_list.addItem(self._file_map[f])
+
+                
+    def _on_file_clicked(self, s):
+        print(s)
+    
+    
\ No newline at end of file